Improved car-spring



T. SHAW.

Car Spring. No. 49,560. Patented Aug. 22. 1865.

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UNITED STATES PATENT OFFICE.

THOMAS SHAW, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVED CAR-SPRING.

Specification forming part of Letters Patent No. 49,560, dated August 272, 1865.

In order to enable others to use and practice my invention, I will proceed to describe its construction and operation.

On reference to the accompanyingdrawing, which forms a part of the specification, the sketch represents a vertical section through the center of the spring, of which a is the box or body, in which a cap, I), fits loosely, pressing' upon four disks of cork, d, intervening which are three disks of sheet metal, 6, the whole of which are secured to box a by means of screw 0.

The cork has sutficient elasticity, with great supporting power, and can be used with or without a boX, a. The plates 0 are employed to prevent the spreading of the cork.

Cork is most elastic when moistened, in view of which I prepare the cork by boiling in (or soaking in) molasses and water. The molasses that is absorbedkeeps the cork moistened.

What I claim, and desire to secure by Let ters Patent, is

The employment of cork in the manner and for the purpose set forth.

THOMAS SHAW. [L. s.] Witnesses:

ROBERT HU'roHINsoN, W ASHINGTON J. GEAR. 

